"Planet Mongo!" is an "AstroBASIC" game written by Fred Rodney. It was submitted to the Bally Arcade/Astrocade "Arcadian" newsletter in 1984. Unlike other programs by Rodney, this game was never published. This "Planet Mongo!" review is by BallyAlley and Chris++.
Planet Mongo has a nuclear waste disposal problem. You must protect your planet from an orbiting satellite. Orbit movement is random but curves are smooth and movement can be predicted. During normal play, the planet has an energy ring that must not be touched. Play begins with the crosshairs in the center of Planet Mongo. You must move the crosshairs out of the planet. If your crosshairs cover the satellite while you are within the planet's ring, the planet will explode and the game will end.
This video is split into several parts:
0:00 - Titles 0:05 - Overview and Background 10:35 - Planet Mongo! Gameplay and Review 24:18 - Planet Mongo! "AstroBASIC" Program Listing 25:29 - End Credits
"Planet Mongo!" is an excellent example of a worthwhile BASIC game that did not get published. Now, if you find it interesting, then you can try the archived version of this game that is available on BallyAlley.com.